<template>
  <!-- 三级分类全局组件-->
  <Category :scene="scene"></Category>
  <!-- 展示页面 -->
  <el-card style="margin: 10px 0px" v-show="scene ==0">
    <el-button type="primary" size="default" icon="Plus" @click="addAttr" :disabled="categoryStore.c3Id ? false : true">
      添加属性
    </el-button>
    <el-table border style="margin: 10px 0px" :data="attrArr">
      <el-table-column label="序号" type="index" align="center" width="80px"></el-table-column>
      <el-table-column label="属性名称" width="120px" prop="attrName"></el-table-column>
      <el-table-column label="属性值名称">
        <!-- row：已有的属性对象 -->
        <template #="{ row, $index }">
          <el-tag style="margin: 5px" v-for="(item, index) in row.attrValueList" :key="item.id">
            {{ item.valueName }}
          </el-tag>
        </template>
      </el-table-column>
      <el-table-column label="操作" width="120px">
        <!-- row：已有的属性对象 -->
        <template v-slot="{ row, $index }">
          <!-- 修改已有属性的按钮 -->
          <el-button type="primary" size="small" icon="Edit" @click="updateAttr(row)"></el-button>
          <el-button type="primary" size="small" icon="Delete" @confirm="deleteAttr(row.id)"></el-button>
        </template>
      </el-table-column>
    </el-table>
  </el-card>
  <!--  -->
  <!-- 新增 -->
  <div v-show="scene == 1">
    <!-- 展示添加属性与修改数据的结构 -->
    <el-card style="margin: 10px 0px">
      <el-form :inline="true">
        <el-form-item label="属性名称">
          <el-input placeholder="请你输入属性名称" v-model="attrParams.attrName"></el-input>
        </el-form-item>
      </el-form>
      <el-button @click="addAttrValue" type="primary" size="default" icon="Plus">添加属性值</el-button>
      <el-button type="primary" size="default" @click="cancel">取消</el-button>
      <!--  -->
      <el-table border style="margin:10px 0px" :data="attrParams.attrValueList">
        <el-table-column label="序号" width="80px" type="index" align="center"></el-table-column>
        <el-table-column label="属性值名称">
          <!--   row:即为当前属性值对象 -->
          <template #="{ row, $index }">
            <el-input v-model="row.valueName" v-if="row.flag" @blur="toLook(row, $index)" size="small" placeholder="请你输入属性值名称" :ref="(vc: any) => inputArr[$index] = vc"></el-input>
            <div v-else @click="toEdit(row, $index)">{{ row.valueName }}</div>
          </template>
        </el-table-column>
        <el-table-column label="属性值操作">
          <template #="{ row, index }">
            <el-button type="primary" size="small" icon="Delete" @click="attrParams.attrValueList.splice(index, 1)"></el-button>
          </template>
        </el-table-column>
      </el-table>
      <el-button type="primary" size="default" @click="save">保存</el-button>
      <el-button type="primary" size="default" @click="cancel">取消</el-button>
    </el-card>
  </div>
</template>

<script setup lang="ts">
import Category from '@/components/Category/index.vue'
//组合式API函数
import { watch, ref, reactive, nextTick, onUnmounted } from 'vue'
//引入获取已有属性与属性值接口
import { reqAddOrUpdateAttr, reqAttr, reqRemoveAttr } from '@/api/product/attr'
import type { AttrResponseData, Attr } from '@/api/product/attr/type'
//引入分类相关的仓库
import useCategoryStore from '@/store/modules/category'
import { ElMessage } from 'element-plus'
let categoryStore = useCategoryStore()
//存储已有的属性与属性值
let attrArr = ref<Attr[]>([])
let inputArr = ref<any>([])
//收集新增的属性的数据
let attrParams: Attr = reactive<Attr>({
  attrName: '', //新增的属性的名字
  attrValueList: [
    //新增的属性值数组
  ],
  categoryId: '', //三级分类的ID
  categoryLevel: 3 //代表的是三级分类
})

//属性值表单元素失却焦点事件回调
const toLook = (row: AttrValue, $index: number) => {
  //非法情况判断1
  if (row.valueName.trim() == '') {
    //删除调用对应属性值为空的元素
    attrParams.attrValueList.splice($index, 1)
    //提示信息
    ElMessage({
      type: 'error',
      message: '属性值不能为空'
    })
    return
  }
  //非法情况2
  let repeat = attrParams.attrValueList.find(item => {
    //切记把当前失却焦点属性值对象从当前数组扣除判断
    if (item != row) {
      return item.valueName === row.valueName
    }
  })

  if (repeat) {
    //将重复的属性值从数组当中干掉
    attrParams.attrValueList.splice($index, 1)
    //提示信息
    ElMessage({
      type: 'error',
      message: '属性值不能重复'
    })
    return
  }
  //相应的属性值对象flag:变为false,展示div
  row.flag = false
}

//删除某一个已有的属性方法回调
const deleteAttr = async (attrId: number) => {
  //发相应的删除已有的属性的请求
  let result: any = await reqRemoveAttr(attrId)
  //删除成功
  if (result.code == 200) {
    ElMessage({
      type: 'success',
      message: '删除成功'
    })
    //获取一次已有的属性与属性值
    getAttr()
  } else {
    ElMessage({
      type: 'error',
      message: '删除失败'
    })
  }
}
//路由组件销毁的时候，把仓库分类相关的数据清空
onUnmounted(() => {
  categoryStore.$reset()
})
const updateAttr = (row: Attr) => {
  //切换为添加与修改属性的结构
  scene.value = 1
  //将已有的属性对象赋值给attrParams对象即为
  //ES6->Object.assign进行对象的合并
  row.attrValueList.forEach(element => {
    element.flag = true
  })
  Object.assign(attrParams, JSON.parse(JSON.stringify(row)))
}

//添加属性值按钮的回调
const addAttrValue = () => {
  //点击添加属性值按钮的时候,向数组添加一个属性值对象
  attrParams.attrValueList.push({
    valueName: '',
    flag: true //控制每一个属性值编辑模式与切换模式的切换
  })
  //获取最后el-input组件聚焦
  nextTick(() => {
    inputArr.value[attrParams.attrValueList.length - 1].focus()
  })
}

//保存按钮的回调
const save = async () => {
  //发请求
  let result: any = await reqAddOrUpdateAttr(attrParams)
  //添加属性|修改已有的属性已经成功
  if (result.code == 200) {
    //切换场景
    scene.value = 0
    //提示信息
    ElMessage({
      type: 'success',
      message: attrParams.id ? '修改成功' : '添加成功'
    })
    //获取全部已有的属性与属性值（更新页面）
    getAttr()
  } else {
    ElMessage({
      type: 'error',
      message: attrParams.id ? '修改失败' : '添加失败'
    })
  }
}
//添加属性按钮的回调
const addAttr = () => {
  //每一次点击的时候,先清空一下数据再收集数据
  Object.assign(attrParams, {
    attrName: '', //新增的属性的名字
    attrValueList: [
      //新增的属性值数组
    ],
    categoryId: categoryStore.c3Id, //三级分类的ID
    categoryLevel: 3 //代表的是三级分类
  })
  //切换为添加与修改属性的结构
  scene.value = 1
}
//定义card组件内容切换变量
let scene = ref<number>(0) //scene=0,显示table,scene=1,展示添加与修改属性结构
//监听仓库三级分类ID变化
watch(
  () => categoryStore.c3Id,
  () => {
    attrArr.value = []
    //获取分类的ID
    console.log('获得c3')
    if (categoryStore.c3Id !== '') {
      getAttr()
    }
  }
)
//取消按钮的回调
const cancel = () => {
  scene.value = 0
}
//获取已有的属性与属性值方法
const getAttr = async () => {
  const { c1Id, c2Id, c3Id } = categoryStore
  //获取分类下的已有的属性与属性值
  let result: AttrResponseData = await reqAttr(c1Id, c2Id, c3Id)
  console.log(result)
  if (result.code == 200) {
    attrArr.value = result.data
  }
}
</script>
<style lang="scss" scoped></style>
